I mention this just because the old Lima/MP cars are readily available and often cheap (not withstanding the eBay sellers trying to get $29.95 ea lately). But anyway, those cars are relatively easy to cut down into shorties that have a PRR look to them.

Car in the middle of that group is one that I picked up 3rd hand in a box of misc passenger cars. Former Lima/MP coach, the modeler who bashed it also rounded the roof (looks better in person than in the photo). Not sure that it is a model of any particular prototype, but certainly could be.
You have a printer, right? design some trucks to recycle the electric pickup. Measure the axle spacing and shrink the length of a 2DP5 styled side frame to match the pickup spacing on the original trucks. Design the bolster center beam of the truck to mate in the same fashion as the original. I don’t know the design of these trucks though.
Assuming what I think are Bachmann trucks in my parts box really are, they have the same axle spacing (+/- a hundredth or 2) as the trucks on my Hellgate B60b, which (IIRC) are the Des Plaines models version of a 2DP5. That said, always take anything I say about PRR equipment with a grain of salt- I am hardly an expert.